Question 1052923
x John's age..the (32-x) is Mary's age NOW
4 yrs ago...
(x-4) = 2[(32-x) - 4}
x - 4 = 64 - 2x - 8
3x = 60
x = 20, John's age.  Mary's age is 12 {{{32-20}}}
And...4 yrs ago...
16 = 2*8  CHECKS!